In order to see whether there is validity in the Deleuzian critique of Heidegger, a detailed examination of the ontological structure of human existence as depicted in Sein und Zeit is necessary. The examination of all basic components of being-there initially brings to light surprising similarities with Deleuze's philosophical conception, but finally uncovers the fundamental divergence between the two philosophical positions. It is the divergence between the autonomy and unity of thought on the one side, and the heteronomy and multiplicity on the other. This divergence is evident especially in the existential analysis of anxiety where Heidegger finds not a possible disruption of the integrity of the self, but an affirmation of the individual unity of its existence. Such an interpretation of anxiety bears all the signs of what one may call the "romantic strategy" of thought. Supposing that this is the strategy Heidegger applies in Sein und Zeit, it becomes comprehensible why he cannot articulate the pathological disintegration of the self as an original phenomenon.